<template>
  <div class="sidebar-button" @click="$emit('toggle-sidebar')" title="目录">
    <svg
      class="icon"
      xmlns="http://www.w3.org/2000/svg"
      aria-hidden="true"
      role="img"
      viewBox="0 0 448 512"
    >
      <path
        fill="currentColor"
        d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"
        class
      />
    </svg>
  </div>
</template>

<style lang="stylus">
.sidebar-button {
  cursor: pointer;
  display: none;
  width: 1.25rem;
  height: 1.25rem;
  position: absolute;
  padding: 0.6rem;
  top: 0.6rem;
  left: 1rem;

  @media (max-width: $MQMobile) {
    display: block;
  }

  .icon {
    display: block;
    width: 1.25rem;
    height: 1.25rem;
  }
}

@media (min-width: ($MQMobile + 1px)) {
  $mobileSidebarWidth = $sidebarWidth * 0.82;

  .sidebar-button {
    width: 40px;
    height: 40px;
    display: inline-block;
    position: fixed;
    left: 0;
    top: ($navbarHeight + 1rem);
    text-align: center;
    line-height: 44px;
    margin: 5px 8px;
    color: #888;
    border-radius: 50%;
    padding: 0;
    // transition left 0.2s ease
    transition: all 0.2s;

    &:hover {
      background: $accentColor;
      color: #fff;
      box-shadow: 0 0 6px $accentColor;
    }

    .icon {
      display: inline;
      width: 1rem;
      height: 1rem;
    }
  }
}
</style>
